CN212925088U - Nitrogen annealing furnace - Google Patents
Nitrogen annealing furnace Download PDFInfo
- Publication number
- CN212925088U CN212925088U CN202021998492.5U CN202021998492U CN212925088U CN 212925088 U CN212925088 U CN 212925088U CN 202021998492 U CN202021998492 U CN 202021998492U CN 212925088 U CN212925088 U CN 212925088U
- Authority
- CN
- China
- Prior art keywords
- furnace
- gas
- nitrogen
- furnace body
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The nitrogen annealing furnace comprises a furnace body, wherein a heating temperature measuring system, a cooling system, a control system and a nitrogen gas filling and sweeping detection system are arranged on the furnace body. The nitrogen gas filling and sweeping detection system comprises a nitrogen gas supply device, an exhaust device, a furnace gas stirring device and a furnace oxygen gas detection device. The nitrogen supply device is used for filling nitrogen into the furnace body; the exhaust device is used for evacuating the gas in the furnace; the furnace gas stirring device is used for stirring the furnace gas; the oxygen detection device in the furnace comprises an ion flow oxygen sensor for detecting the oxygen content of gas in the furnace. The utility model discloses an ion current oxygen sensor has advantages such as the measurement is accurate, the fault rate is low, long service life, has reduced a large amount of direct costs and indirect cost for the enterprise. The utility model provides high efficiency and the effect of cleaning to the interior gas of stove has reduced the consumption of nitrogen gas by a wide margin to improve other cold cooling efficiency, make keeping of the oxygen content of the interior gas of stove invariable below the technological requirement, guaranteed annealing quality.
Description
Technical Field
The utility model relates to a heat treatment facility field especially relates to a nitrogen annealing stove for preventing annealing piece is in annealing stove oxidation.
Background
In the annealing process, nitrogen gas may be used as a shielding gas for preventing the annealing material such as aluminum, steel, copper, etc. from being oxidized and decarburized during heating, thereby obtaining an annealing material having a bright surface. After the annealing piece is loaded into the furnace, nitrogen purging is carried out in the furnace body, so that the content of oxygen in the furnace body is reduced, and the process requirement is met. Among them, an oxygen content analyzer for detecting the oxygen content of the furnace gas and a device for cleaning and filling the furnace gas are important.
An oxygen content analyzer used in a conventional nitrogen annealing furnace is generally a high-temperature zirconia oxygen analyzer, and the principle of the oxygen content analyzer is that a zirconia tube is heated at high temperature, two poles of the zirconia tube form a potential difference through oxidation and reduction reactions, and oxygen content is detected according to the difference of the potential difference. Specifically, the zirconia tube is a ceramic sintered body which is formed by sintering a certain auxiliary material, and oxygen ion holes exist in the structural lattice of the zirconia tube, so that the zirconia tube is a good oxygen ion conductor at high temperature. When the zirconia tube is heated to over 600 ℃, the one pole with higher oxygen content of the zirconia tube generates a reduction reaction O2+4e→2O2-The pole gives electrons and is positively charged; 2O produced2-The hole in the crystal lattice is transferred to perform oxidation reaction, 2O, at the one pole with low oxygen content in the zirconia tube2-→O2+4e, the electrode gets electrons and is negatively charged, creating a potential difference. The difference in the oxygen content and concentration causes a difference in the potential difference, and oxygen can be generatedAnd (5) detecting the content.
The high-temperature zirconia oxygen analyzer has the advantages that:
1. the measurement sensitivity is high, the response speed is high, and the stability is good;
2. the device has multiple components, complete functions, no influence of external factors and strong anti-interference performance.
Disadvantages of high temperature zirconia oxygen analyzers:
1. the system has complex composition, a plurality of split parts, large volume and high price of complete equipment;
2. the high-temperature heating type zirconia oxygen analyzer can be used only by heating the zirconia tube to a certain temperature, so that a long preheating time is needed;
3. the internal resistance of the zirconia is greatly influenced by the heating temperature, and the precision required by the heating temperature control is high;
4. the equipment is easy to age, the failure rate is greatly increased after aging, the maintenance and spare part cost is high, and great trouble is brought to the continuous production of the annealing furnace.
The existing nitrogen annealing furnace cleans the gas in the furnace by directly blowing high-pressure nitrogen into the furnace, exhausting the gas from an air inlet and an air outlet of a side cooling chamber, uniformly stirring the gas by a stirring fan, and continuously discharging the gas in the furnace from a pressure release valve by means of pressure difference until the oxygen content of the gas in the furnace is reduced to a required range. The cleaning method has the defects of low cleaning efficiency and large consumption of nitrogen, and the side cooling chamber needs to be cleaned no matter whether the side cooling process is used or not, so that the consumption of the nitrogen is increased.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the background art, the utility model discloses a nitrogen annealing furnace, which adopts the following technical scheme:
a nitrogen annealing furnace comprises a furnace body, wherein a heating temperature measuring system, a cooling system and a control system are arranged on the furnace body, and the nitrogen annealing furnace also comprises a nitrogen sweeping detection system;
the nitrogen gas fills sweeps detecting system includes:
the nitrogen supply device is used for filling nitrogen into the furnace body and comprises a nitrogen source, and the nitrogen source is communicated with the furnace body through an upper pipeline, a middle pipeline and a lower pipeline and an air inlet valve;
the exhaust device is used for evacuating gas in the furnace and comprises an exhaust pipe connected with an exhaust fan, and an exhaust end of the exhaust pipe is connected with an exhaust valve;
the furnace gas stirring device is used for stirring the furnace gas and comprises a stirring fan arranged at the top of the furnace body;
the in-furnace oxygen detection device comprises an ion flow oxygen sensor, wherein the ion flow oxygen sensor is communicated with in-furnace gas through a sampling pipe and is used for detecting the oxygen content of the in-furnace gas;
the pressure relief device comprises a pressure relief valve which is communicated with the furnace body through a pipeline.
Further improving the technical scheme, the cooling system comprises an external cooling box; and the exhaust pipe is connected with a reflux cooling pipe between the exhaust fan and the exhaust valve, and the reflux cooling pipe penetrates through the cooling box outside the furnace and is communicated with the furnace body through the cooling valve.
The technical scheme is further improved, an upper pipeline and an air inlet valve are communicated with the top of the furnace body, a middle pipeline and an air inlet valve are communicated with the middle part of the side wall of the furnace body, and a lower pipeline and an air inlet valve are communicated with the lower part of the side wall of the furnace body; the inner diameter of the lower pipeline is larger than that of the middle pipeline, and the inner diameter of the middle pipeline is larger than that of the upper pipeline.
The technical scheme is further improved, and four working areas are arranged in the furnace body; the lower pipeline is provided with four access branch pipes which are correspondingly communicated with four working areas respectively.
Further improve technical scheme, the pipeline intercommunication of going up is in stirring fan's air inlet end.
The technical scheme is further improved, and the air outlet end of the stirring fan is connected with a flow guide device; the flow guiding device is formed by arranging a plurality of groups of flow guiding plates, each group of flow guiding plates is provided with a vertical surface parallel to the air inlet direction, and the lower part of the vertical surface is connected with an inclined surface which forms an inclined angle of 45 degrees with the air inlet direction.
The technical scheme is further improved, and the air inlet valve, the exhaust fan, the exhaust valve and the ion current oxygen sensor are connected with a control system.
Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:
the utility model discloses replace current high temperature zirconia oxygen analysis appearance with ion current oxygen sensor, compare in high temperature zirconia oxygen analysis appearance, ion current oxygen sensor has advantages such as the measurement is accurate, the fault rate is low, long service life, has reduced a large amount of direct costs and indirect cost for the enterprise.
The utility model provides high efficiency and the effect of cleaning to the interior gas of stove has reduced the consumption of nitrogen gas by a wide margin to improve other cold cooling efficiency, energy saving and consumption reduction's effect is very obvious. In addition, the ion current oxygen sensor can monitor the oxygen content in the furnace in real time, and the control system can adjust the filling amount of nitrogen at any time according to the oxygen content in the furnace, so that the oxygen content of the gas in the furnace is kept constant below the process requirement, and the annealing quality of an annealing piece is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a furnace body; 2. a heater; 3. an exhaust fan; 4. an exhaust valve; 5. a cooling box outside the furnace; 6. cooling the valve; 7. a stirring fan; 8. a flow guide device; 9. an upper pipeline; 10. a middle pipeline; 11. a down pipe; 12. an intake valve; 13. an ion flux oxygen sensor; 14. a sampling tube; 15. and (4) releasing the valve.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
A nitrogen annealing furnace, as shown in figure 1, comprises a furnace body 1, wherein a heating temperature measuring system, a cooling system and a control system are arranged on the furnace body 1. The furnace body 1 is a cuboid, a furnace door which is vertically hung is arranged at the feed end of the furnace, and the furnace door is used for sealing the furnace body 1. Four working areas are arranged in the furnace body 1, and a set of heating and temperature measuring system is arranged at the top of each working area. The heating temperature measuring system comprises a bayonet type heater 2, and the heater 2 is arranged on two sides of the furnace top. The heater 2 is composed of a spiral heating element formed by winding a resistance band and a ceramic heat-resistant insulating member, and is temperature-controlled by means of a PID and a periodic controller. The cooling system comprises an external cooling box 5 arranged outside the furnace body 1, wherein the external cooling box 5 is cooled by water circulation, comprises components such as a water jacket, a radiator and the like and is used for cooling gas in the furnace. In addition, the nitrogen annealing furnace is also provided with a nitrogen gas filling and sweeping detection system, which comprises a nitrogen gas supply device, an exhaust device, a furnace gas stirring device and a furnace oxygen detection device, and the following details are provided.
And the exhaust device is used for emptying gas in the furnace and comprises an exhaust pipe connected with an exhaust fan 3, the gas inlet end of the exhaust pipe is arranged at the top of the furnace body 1, and the exhaust end of the exhaust pipe is connected with an exhaust valve 4. When the gas in the furnace is cleaned, the exhaust valve 4 and the exhaust fan 3 are simultaneously opened, and the gas in the furnace is pumped out and emptied. The exhaust valve 4 is opened only during purging, and if the process requires side cooling, the cooling valve 6 is opened during purging, and the cooling chamber air is simultaneously evacuated. In order to simplify the pipeline and improve the utilization rate of the exhaust fan 3, a reflux cooling pipe is connected between the exhaust fan 3 and the exhaust valve 4 of the exhaust pipe, and the reflux cooling pipe penetrates through an external cooling box 5 and then is communicated with the furnace body 1 through a cooling valve 6. When the gas in the annealing furnace needs to be cooled, the exhaust valve 4 is in a closed state, the high-temperature gas in the annealing furnace enters the reflux cooling pipe through the exhaust fan 3, then exchanges heat with a radiator in the cooling box 5 outside the annealing furnace for cooling, and returns to the furnace body 1 through the cooling valve 6 after cooling. In order to facilitate automatic control, the exhaust valve 4 and the cooling valve 6 are electrically controlled pneumatic valves, and are controlled to open and close by a control system.
The furnace gas stirring device is used for stirring the furnace gas and comprises a stirring fan 7 arranged at the top of the furnace body 1. Four stirring fans 7 are respectively arranged at the tops of the four working areas and are connected with the top of the furnace body 1 through flanges. The stirring fan 7 adopts a motor direct-connected fan, and in order to realize the adjustable rotating speed, the motor is driven by a frequency converter; in order to realize heat dissipation, the shell of the fan adopts a fully-sealed water cooling structure. The stirring fan 7 has the functions of enabling the nitrogen and oxygen components of the gas in the furnace to be uniform and enabling the temperature to be uniform; and secondly, when the gas in the furnace is cleaned, the gas is ensured to flow, and the cleaning dead angle is prevented.
In order to enable the stirring of the stirring fan 7 to be more uniform, the air outlet end of the stirring fan 7 is connected with a flow guide device 8, the flow guide device 8 is formed by arranging a plurality of groups of flow guide plates, each group of flow guide plates is provided with a vertical surface parallel to the air inlet direction, and the lower part of the vertical surface is connected with an inclined surface which forms an inclined angle of 45 degrees with the air inlet direction. The guiding device 8 can change the wind direction of the air outlet end of the stirring fan 7, so that the gas in the furnace is more uniform.
The nitrogen gas supply device is used for filling nitrogen gas into the furnace body 1, and comprises a nitrogen gas source, wherein a main pipeline of the nitrogen gas source is provided with a nitrogen gas flowmeter, a main pneumatic valve, a mechanical regulating valve, a pressure gauge and the like, and the main pipeline is divided into an upper pipeline, a middle pipeline and a lower pipeline before entering the furnace body 1 and is communicated with the furnace body 1 through an air inlet valve 12. Each air inlet valve 12 is an electrically controlled pneumatic valve, and is controlled to open and close by a control system. The upper pipeline 9 and the air inlet valve 12 are communicated with the top of the furnace body 1 and the air inlet end of the stirring fan 7, the middle pipeline 10 and the air inlet valve 12 are communicated with the middle part of the side wall of the furnace body 1, and the lower pipeline 11 and the air inlet valve 12 are communicated with the lower part of the side wall of the furnace body 1. The lower pipeline 11 is a main air inlet pipeline, so the inner diameter of the lower pipeline 11 is larger than that of the middle pipeline 10, and the inner diameter of the middle pipeline 10 is larger than that of the upper pipeline 9. In order to increase the air input of the lower pipeline 11 and ensure the cleaning efficiency and effect of the gas in the furnace, the lower pipeline 11 is provided with four access branch pipes which are respectively communicated with four working areas correspondingly.
The oxygen detection device in the furnace comprises an ion flow oxygen sensor 13, wherein the ion flow oxygen sensor 13 is communicated with gas in the furnace through a sampling pipe 14 and is used for detecting the oxygen content of the gas in the furnace. In this embodiment, the ion flux oxygen sensor 13 is a P860 series ion flux oxygen sensor 13. The ion flow oxygen sensor 13 works on the principle that oxygen molecules are subjected to electron losing by applying voltage to electrodes, ion flow is formed in the movement process, and then the oxygen content is obtained through calculation. In particular, in the solid electrolyte ZrO2-Y2O2The anode and the cathode are attached to two sides of the hollow cavity, a certain voltage is applied to the two sides of the electrode, oxygen molecules in the hollow cavity obtain electrons at the cathode to form oxygen ions, and the oxygen ions pass through ZrO2The holes migrate to the anode, and after the electrons are released, they become oxygen molecules, thereby forming an ionic current. The ion current generated by different oxygen concentrations is different, and different oxygen contents can be reflected by calculating the ion current.
Advantages of the ion flux oxygen sensor 13:
1. the ion current oxygen sensor 13 has been put into the market for many years, and the technology is mature, stable and reliable; the method is widely applied to the protective gas industries such as air separation, chemical engineering, smelting, semiconductors and the like at present;
2. the measurement precision meets the requirement of industrial production;
3. the structure is simple, the volume is small, and the service life is more than 5 years;
4. the price is low, each is only thousands of yuan, the cost performance is high;
5. the stability is strong, and the fault rate is extremely low, and maintains and changes convenient and fast.
Disadvantages of the ion flux oxygen sensor 13:
1. the requirement on sample gas is high, and the measurement precision is easily influenced by pressure fluctuation, dust and the like;
2. is susceptible to the working environment, such as levelness, vibration, and environmental magnetic field.
From the above, the ion current oxygen sensor 13 has a remarkable comprehensive advantage compared to a high-temperature zirconia oxygen analyzer. In order to protect the ion flow oxygen sensor 13 from the influence of the factors such as pressure fluctuation in the furnace, dust and the like, the gas in the sampling pipe 14 is subjected to pressure reduction, pressure stabilization, oil removal and dust removal treatment before entering the ion flow oxygen sensor 13.
The pressure relief device is arranged at the top of the furnace body 1 and comprises a pressure relief valve, and the pressure relief valve is communicated with the furnace body through a pipeline. The pressure relief valve is used for controlling the pressure in the furnace within a certain range, and when the pressure is high, the pressure is released to the outside.
In order to realize the centralized control and automatic operation of the control system, the stirring fan 7, the ion current oxygen sensor 13, the pressure release valve and other devices are connected with the control system and controlled by the control system. The core of the control system adopts a SIEMENS S7-300 PLC controller, and is provided with an upper computer and a field operation substation, so that remote and local control can be realized. The operator can set the annealing process through HMI, in each called process, various parameters are preset in advance, and meanwhile, according to actual needs, various parameters can be modified on line in the production process, and the whole annealing process automatically runs according to the set process.
When the natural cooling process is implemented, the furnace door is closed after the annealing piece is put into the furnace body 1. Since oxygen gas is mixed into the furnace during this time, the furnace gas is purged with nitrogen gas. First, the control system opens the exhaust valve 4 and the exhaust fan 3 to exhaust air to the outside, so that negative pressure is formed in the furnace. And when the set air extraction time is reached, closing the exhaust valve 4 and the exhaust fan 3, starting the stirring fan 7, opening the air inlet valves 12 on the upper, middle and lower pipelines, and filling nitrogen into the furnace body 1. When the pressure in the furnace reaches a certain pressure, the pressure release valve 15 is opened and exhausts the gas to balance the pressure in the furnace. The stirring fan 7 has the functions of enabling the nitrogen and oxygen components of the gas in the furnace to be uniform and enabling the temperature to be uniform; and secondly, when the gas in the furnace is cleaned, the gas in the furnace can flow, so that the cleaning dead angle is prevented. When the ion current oxygen sensor 13 detects that the oxygen content in the furnace is lower than 0.3%, the control system closes the air inlet valve 12 on the lower pipeline 11, the upper and middle pipelines still fill nitrogen into the furnace, but the filling amount of the nitrogen is obviously reduced. At this time, the heater 2 starts heating, and the rotation speed of the agitating fan 7 starts increasing. When the ion current oxygen sensor 13 detects that the oxygen content in the furnace is lower than 0.1%, the control system closes the air inlet valve 12 on the middle pipeline 10, only the upper pipeline 9 is reserved for filling nitrogen into the furnace, but the filling amount of the nitrogen is small, and the oxygen content in the furnace is only maintained. If the oxygen content in the furnace is higher than 0.1%, the control system reopens the air inlet valve 12 on the middle pipeline 10 to increase the filling amount of nitrogen and ensure that the oxygen content in the furnace is lower than 0.1%. In this process, the relief valve 15 equalizes the furnace pressure. The annealing process is automatically executed according to a set program, after the process stages of multi-stage heating, heat preservation, temperature reduction, heat preservation and the like are carried out, the natural cooling stage is carried out, the furnace door is opened, and the annealing piece is discharged from the furnace for natural cooling.
When the side cooling process is implemented, firstly, the control system opens the exhaust valve 4, the cooling valve 6 and the exhaust fan 3 to exhaust to the outside, so that negative pressure is formed in the furnace. When the set air extraction time is reached, the exhaust valve 4 is closed, but the exhaust fan 3 is not closed temporarily, and the exhaust fan 3 enables the gas to circularly flow between the furnace body and the side cooling chamber. And then starting the stirring fan 7, opening the air inlet valves 12 on the upper, middle and lower pipelines, and filling nitrogen into the furnace body 1 for cleaning. When the pressure in the furnace reaches a certain pressure, the pressure release valve 15 is opened and exhausts the gas to balance the pressure in the furnace. When the oxygen content in the furnace meets the requirement, the exhaust fan 3 and the cooling valve 6 are closed to complete the cleaning of the gas in the furnace. When entering the side cooling process, the control system opens the exhaust fan 3 and the cooling valve 6 again, at the moment, the high-temperature gas in the furnace enters the reflux cooling pipe through the exhaust fan 3 and the exhaust pipe, then exchanges heat with a radiator in the cooling box 5 outside the furnace for cooling, and returns to the furnace body 1 through the cooling valve 6 after cooling, and the circulation is carried out, so that the cooling of the gas in the furnace is realized.
Through the arrangement and the control, the cleaning efficiency and the cleaning effect of the gas in the furnace are improved, the consumption of nitrogen is greatly reduced, the cooling efficiency of side cooling is improved, and the effects of energy conservation and consumption reduction are very obvious. In addition, the ion current oxygen sensor 13 can monitor the oxygen content in the furnace in real time, and the control system can adjust the filling amount of nitrogen at any time according to the oxygen content in the furnace, so that the oxygen content of the gas in the furnace is kept constant below the process requirement, and the quality of an annealing piece is ensured.
The part of the utility model not detailed is prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a nitrogen annealing stove, includes the furnace body, is provided with heating temperature measurement system, cooling system and control system, characterized by on the furnace body: the device also comprises a nitrogen gas filling and sweeping detection system;
the nitrogen gas fills sweeps detecting system includes:
the nitrogen supply device is used for filling nitrogen into the furnace body and comprises a nitrogen source, and the nitrogen source is communicated with the furnace body through an upper pipeline, a middle pipeline and a lower pipeline and an air inlet valve;
the exhaust device is used for evacuating gas in the furnace and comprises an exhaust pipe connected with an exhaust fan, and an exhaust end of the exhaust pipe is connected with an exhaust valve;
the furnace gas stirring device is used for stirring the furnace gas and comprises a stirring fan arranged at the top of the furnace body;
the in-furnace oxygen detection device comprises an ion flow oxygen sensor, wherein the ion flow oxygen sensor is communicated with in-furnace gas through a sampling pipe and is used for detecting the oxygen content of the in-furnace gas;
the pressure relief device comprises a pressure relief valve which is communicated with the furnace body through a pipeline.
2. The nitrogen annealing furnace according to claim 1, wherein: the cooling system comprises an external cooling box; and the exhaust pipe is connected with a reflux cooling pipe between the exhaust fan and the exhaust valve, and the reflux cooling pipe penetrates through the cooling box outside the furnace and is communicated with the furnace body through the cooling valve.
3. The nitrogen annealing furnace according to claim 1, wherein: the upper pipeline and the air inlet valve are communicated with the top of the furnace body, the middle pipeline and the air inlet valve are communicated with the middle part of the side wall of the furnace body, and the lower pipeline and the air inlet valve are communicated with the lower part of the side wall of the furnace body; the inner diameter of the lower pipeline is larger than that of the middle pipeline, and the inner diameter of the middle pipeline is larger than that of the upper pipeline.
4. A nitrogen annealing furnace according to claim 3, wherein: four working areas are arranged in the furnace body; the lower pipeline is provided with four access branch pipes which are correspondingly communicated with four working areas respectively.
5. A nitrogen annealing furnace according to claim 3, wherein: the upper pipeline is communicated with the air inlet end of the stirring fan.
6. The nitrogen annealing furnace according to claim 1, wherein: the air outlet end of the stirring fan is connected with a flow guide device; the flow guiding device is formed by arranging a plurality of groups of flow guiding plates, each group of flow guiding plates is provided with a vertical surface parallel to the air inlet direction, and the lower part of the vertical surface is connected with an inclined surface which forms an inclined angle of 45 degrees with the air inlet direction.
7. The nitrogen annealing furnace according to claim 1, wherein: the air inlet valve, the exhaust fan, the exhaust valve and the ion current oxygen sensor are connected with a control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021998492.5U CN212925088U (en) | 2020-09-14 | 2020-09-14 | Nitrogen annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021998492.5U CN212925088U (en) | 2020-09-14 | 2020-09-14 | Nitrogen annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212925088U true CN212925088U (en) | 2021-04-09 |
Family
ID=75305620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021998492.5U Active CN212925088U (en) | 2020-09-14 | 2020-09-14 | Nitrogen annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212925088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113509658A (en) * | 2021-07-07 | 2021-10-19 | 上海格创机电设备成套有限公司 | Automatic fire extinguishing system and method for chemical supply cabinet |
-
2020
- 2020-09-14 CN CN202021998492.5U patent/CN212925088U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113509658A (en) * | 2021-07-07 | 2021-10-19 | 上海格创机电设备成套有限公司 | Automatic fire extinguishing system and method for chemical supply cabinet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108726850B (en) | Pressure-controlled glass melting device and method | |
| WO2020124544A1 (en) | Vacuum degreasing and sintering furnace and usage method therefor | |
| CN212925088U (en) | Nitrogen annealing furnace | |
| CN100470434C (en) | Device and method for controlling atmosphere content and pressure balance in negative pressure container | |
| CN108844369A (en) | For simulating the batch-type furnace of anode material of lithium battery sintering experiment | |
| CN206556421U (en) | A kind of aluminium alloy high-efficiency vacuum smelting apparatus | |
| CN101988180A (en) | Intelligent control gas multi-component permeation furnace and control method thereof | |
| CN209974843U (en) | Heat treatment equipment for nanocrystalline alloy strip | |
| CN110243755B (en) | Top corrosion test system and test method for variable wind field regulation in autoclave | |
| CN217063679U (en) | Photovoltaic module light infiltration device | |
| CN116559062A (en) | Test equipment and test method for dynamic high-temperature molten salt corrosion | |
| CN107478567B (en) | Test device and method for simulating corrosion of hollow copper conductor of generator in internal cold water | |
| CN115573005A (en) | Lower cathode rare earth electrolytic cell | |
| CN110260670B (en) | Control device and control method for melting atmosphere in electric melting furnace | |
| CN211626082U (en) | Novel bell jar sintering furnace for sintering magnetic materials | |
| CN213984508U (en) | Atmosphere sintering furnace structure | |
| CN204803005U (en) | Be arranged in industry hydrogen peroxide solution production process on -line measuring and continuous acidification device | |
| CN208872094U (en) | A kind of tubular type annealing device | |
| CN114396798A (en) | Lithium battery material sintering atmosphere furnace based on circulation cooling and circulation cooling method thereof | |
| CN112763517A (en) | Irradiation test device in reactor | |
| CN201623010U (en) | Low-oxygen control system | |
| CN2445321Y (en) | Multi-atmosphere high-temp corrosion thermobalance measuring means | |
| CN211739607U (en) | Cooling device of thermogravimetric analyzer | |
| CN109612269A (en) | For oxygen content autocontrol method in the kiln of lithium battery material sintering | |
| CN220063779U (en) | Test equipment for dynamic high-temperature molten salt corrosion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |